Relating to adjustable stays

ABSTRACT

An adjustable stay comprising a tubular member having an elongated member telescopically extensible therefrom, one of said members having at least part of its length of non-circular crosssection and the other member having a co-operating portion of non-circular cross-section adapted upon relative rotation of the members to engage and disengage the said one member.

United States atent n91 Venter RELATING TO ADJUSTABLE STAYS [76] Inventor: Tjaart Petrus Venter, 117 Koos de la Ray Street, Pretoria North, Transvaal, South Africa [22] Filed: March 25, 1971 [21] Appl.No.: 128,350

[52] US. Cl ..292/275, 292/67, 292/DIG. 30, 16/85 [51] Int. Cl ..E05c 17/30 [58] Field of Search ..292/275, 262, 259, 57, 60, 292/63, 67, DIG. 30, 338, 175; 16/85 [56] References Cited UNITED STATES PATENTS 2,164,732 7/1939 DeVries ..292/275 [4 1 March 6, 1973 8/1921 Subroyar.... ..292/275X 8/1900 Dutton ..292/262X Primary ExaminerRichard E. Moore Attorney-Kenyon & Kenyon Reilly Carr & Chapin 5 7 ABSTRACT members to engage and disengage the said one member.

3 Claims, 2 Drawing Figures RELATING TO ADJUSTABLE STAYS This invention relates to adjustable stays generally provided on openable windows to lock such windows in any open position thereof, but which may also be used for the same purpose on doors or like closable openings.

It is the object of this invention to provide an adjustable stay which is of a simple, effective and inexpensive construction and a closable opening incorporating this stay.

In accordance with this invention there is provided an adjustable stay comprising a tubular member having an elongated member telescopically extensible therefrom, one of said members having at least part of its length of non-circular cross-section and the other member having a co-operating portion of non-circular cross-section adapted upon relative rotation of the members to engage and disengage the said one member.

Further features of the invention provide for the elongated member to be a rod, for the rod or tubular member to be pivotally connected to a bracket at one end thereof, the bracket being securable to the immovable part of a frame for a closable opening, for the free end of the tube or rod, respectively, to be rotatably mounted in a bracket securable to the movable part of said frame and for the free end of the tube or rod, respectively, to be adapted to form a catch for a window or door in use.

A further feature of the invention provides for the members to be spring loaded towards a position in which a locking member engages the wall of the tube.

A preferred embodiment of the invention will be described below by way of example as applied to a window stay, reference being made to the accompanying drawings in which:

FIG. 1 is a cross-sectional side elevation of an adjustable stay mounted on a closed window;

FIG. 2 is an isometric view of an open window having an adjustable stay fitted thereon.

This embodiment of the invention is to be applied to a window having a steel window frame 1 adapted to be immovably located in a wall and a movable window frame 2 hingedly connected to the immovable frame 1.

Approximately midway along the hinged side 3 of the immovable window frame 1 is secured an inwardly and transversely projecting bracket 4 to the free end 5 of which is pivotally attached one end of a rod 6 having at its free end a locking formation 7 of non-circular crosssection.

Telescopically movable over the free end of the rod 6 is a tube 8 of oval cross-section.

The locking formation 7 and tube 8 are dimensioned such that upon rotation of the rod 6 the locking formation 7 engages the inner wall of the tube 8 to interlock and prevent telescopic movement of the rod 6. Thus it will be understood that the rod 6 may be locked to the tube 8 in any degree of extension therefrom by rotating the tube 8 to the locked position.

The free end 9 of the tube 8 is rotatably mounted on a bracket 10 secured to the movable window frame 2, the bracket being located adjacent the edge opposite the hinged edge of the movable window frame 2. The tube 8 is also provided with an operating handle 11 which passes through a housing 12 on the bracket 10 and is secured to the tube 8 for example by welding. The housing 12 may have a perforation therethrough allowing only rotational movement of the tube 8 relative to the bracket but preferably has a perforation l3 shaped to conform to a quarter of a helical convolution. The latter shape of perforation 13 is such that it will co-operate with a helix 14 on the tube 8 to move the tube 8 axially a short distance upon rotation of said tube 8. The arrangement is such that upon rotation of the tube to lock it to the rod 6 the free end 9 of the tube 8 moves outwardly to project a short distance beyond the edge of the movable frame 2. In this case the free end 9 of the tube 8 forms a catch for locking the window frame positively in a closed position by projecting across the inside of the immovable frame 1.

Also, the tube 8 is preferably spring loaded towards the locked position. This is provided by a helical spring 15 located over the tube 8 and in the housing 12, and which is adapted to act between a flange 16 in the housing 12 and a shoulder 17 on the tube 8.

In use, with the locking formation 7 disengaged from the tube 8 against the spring loading, the movable window 2 may be opened or closed freely relative to the immovable frame 1. This may be effected since the rod 6 moves freely and telescopically out of or into the tube. When it is desired to lock the movable window frame 2 in any open position thereof the tube 8 may be rotated by means of the operating handle or in the case of spring loaded adjustable stays, merely released to cause engagement of the locking formation 7 with the tube 8, the spring loading maintaining it in this position.

Also, if the window is closed completely, the tube end 9 will move behind the immovable window frame 1 thereby acting as a catch as will be clear from the above and from the drawings.

Alternate forms of the invention include the position of the tube and rod being reversed, that is, the tube being pivotally mounted on the hinged side of the immovable frame, whereas the rod is rotatably supported on the free side of the movable window frame. Also, the tube may have secured to it at its inner end a member having a non-circular perforation to engage with a length of rod having an oval cross-section.

It may not be aesthetical to have the stay across the middle of the window, in which case it may be located at the lower end thereof. However, a latch will be provided in the middle or at the upper end of the movable frame to engage the immovable frame. A lever, push rod or cable will be located on the immovable frame such that operation of the catch on the tube will disengage the latches and allow the window to be opened.

It is to be understood that a similar type of stay may be used on doors and other closable openings. A door may thus be retained at any degree of opening by such a stay.

It will therefore be appreciated that the invention provides a useful, inexpensive and effective adjustable stay which may be used to obviate the use of conventional door or window catches and which may be arranged to lock automatically after a door or window is opened.

What I claim as new and desire to secure by Letters Patent is:

1. In combination with an immovable window frame and a movable window frame hinged to said immovable movable relative to said one member, said one end of said other member forming a catch to abut said immovable frame with said movable frame disposed in said immovable frame.

2. An adjustable stay as claimed in claim 1 in which the catch is made integral with an operating handle for the rotatably mounted member.

3. An adjustable stay as claimed in claim 1 in which the rotatably mounted member is spring loaded to provide a bias to the rotary movement thereof.

3,719,381 March 6, 1973 Patent No. Dated Inventor-(s) Petrus Venter It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Change the title "from "Relating to Adjustable Stays" to 90 Adjustable Stays-- Signed and sealed this 20th day of November 1973.

(SEAL) Attest:

EDWARD M.FLETCHER,JR. RENE D. 'IEGTMEYER Attesting Officer Acting Commissioner of Patents DRM PC4050 (10-69) USCOMM-DC 60376-P69 U.5. GOVERNMENT PRINTING OFFICE 2 '99 0-356-334, 

1. In combination with an immovable window frame and a movable window frame hinged to said immovable frame; an adjustable stay comprising a tubular member and an elongated member telescopically mounted therewith, one of said members having at least a part of the length thereof of non-circular cross-section and the other of said members having a co-operating portion of non-circular cross-section adapted upon relative rotation of said member to engage and disengage said members to each other, one of said members being pivotally mounted at one end thereof on said immovable frame and the other of said members being rotatably mounted at one end thereof on said movable frame and axially movable relative to said one member, said one end of said other memBer forming a catch to abut said immovable frame with said movable frame disposed in said immovable frame.
 1. In combination with an immovable window frame and a movable window frame hinged to said immovable frame; an adjustable stay comprising a tubular member and an elongated member telescopically mounted therewith, one of said members having at least a part of the length thereof of non-circular cross-section and the other of said members having a co-operating portion of non-circular cross-section adapted upon relative rotation of said member to engage and disengage said members to each other, one of said members being pivotally mounted at one end thereof on said immovable frame and the other of said members being rotatably mounted at one end thereof on said movable frame and axially movable relative to said one member, said one end of said other memBer forming a catch to abut said immovable frame with said movable frame disposed in said immovable frame.
 2. An adjustable stay as claimed in claim 1 in which the catch is made integral with an operating handle for the rotatably mounted member. 